Brake



Feb. 28,1933. J. R. CAUTLEY E1- Al. l

2 Sheets-Sheet l IN VEN TOR. JOHN R. CAUTLEY F FRANK lll/ll /gar REDER l C K C A TTORNEY Feb. 28, 1933. J. R. CAUTLEY ET AL BRAKE Filed oct. 15, 1930 2 sheets-sheet 2 INVENTOR. JOHN R. CAUTLEY FREDERxcK C. F'

RANK

ATTORNEY Patented Feb. 28, 1933 UNITED STATES PATENT OFFICE JOHN R. CAUTLEY AND FREDERICK C. FRANK, OF SOUTH BEND, INDIANA, ASSIGNORS TO BENDIX BRAKE COMPANY, OF SOUTH BEND, IlTDIANA1 A CORPORATION OF ILLDOIS BRAKE Application Bled October 15, 1930. Serial No. 488,768.

. An object of the invention is to strengthen 5 the backing plate or its equivalent, to take braking torque and the like, by a novel builtup construction which facilitates the use of aluminum alloy stampings, thus minimizing the weight. Various features relate to reinforcing the plate at the anchorage, also at the camshaft bearing or its equivalent, and to providing an outboard support for the end of the brake anchor opposite the backing plate,

and to other novel and desirable structures' which will heA apparent from the following description of the illustrative embodiments shown in the accompanying drawings, in which:

Figure 1 is a vertical section through the brake, just inside the head of the brake drum, showing the brake shoes in side elevation;

Figure 2 is a partial radial section, on the line 2-2 of Figure 1,. showing the camshaft mounting;

Figure 3 is a partial section, on the line 3-3 of Figure 1, showing one of the posts supporting an outboard member for the anchor;

Figure 4 is a partial chordal section, on the line 4-4 of Figure 1, showing the ioating joint between the shoes;

Figure 5 is a partial chordal section, on the line 5,--5 of Figure 1, showing the mounting of the camshaft and of the anchorage;

Figure 6 is a section corresponding to Figure 1, but showing a somewhat different construction;

Figure 7 is a section through the brake of Figure 6, on the line 7--7 of Figure 6; and

line 8-8 of Figure 6, showing the mounting ofthe camshaft and ofthe anchor.

The brake of Figure 1l includes a rotatable drum 10, at' the open side of which is a backing plate 12, andwithin which is the friction means, illustrated as of the self-energizing type includin primary and secondary shoes, hoe 16 is anchored at one end 14 and 16. and at the other end has riveted thereto spaced projecting arms 18 between which the lower Figure 8 is a partial chordal section on the y end of shoe 14 is pivoted on a pivot 20 having riveted at its end a forked stop 22 embracing an eccentric stop 24 carried by the backing plate. The brake is applied by means such as a pair of cams 26 engaging rollers 28 on the end of shoe 14, and mounted on a shaft 30 0perated by a lever 32. The cams apply the. brake against the resistance of a main return spring 34 and an auxiliary return spring 36. The present invention relates primarily to the reinforcement of plate 12 or its equivalent, by building it up `with steel or aluminum a1- loy stampings, so that aluminum alloy may be used for the plate itself. Thus in Figures 1-5, an annular reinforcing stamping 40, having a central axle opening registering with the central opening of the backing plate, is welded (or riveted) to the backing plate about said opening, and has a lateral extension projecting upwardly and also secured to the plate preferably with one. or more spacers 42 embraced between it and the plate.

Stamping 40 and plate 12 are additionally secured together by a bushing 44 serving as a bearing for the camshaft 30 and which vis formed with portions riveted over against the stamping and the plate respectively. Stamping 40 is also held by three posts 46, 48, and 50, the irstof which is secured to plate 12 by a nut 52 and the other two of which are riveted over as shownin Figure 3. Post 46 serves as the brake anchor, and the upper end of shoe 16 is pivoted thereon as shown in Figure 5. Posts 46, 48, and 50 carry an outboard member such as a triangular flat plate 54, thereby distributing the braking torque over a large area of the backing plate. Post 50 passes through a relatively large clearance .opening 56 in shoe 16.

In the 'arrangement of Figures 6-8, there is an annular reinforcing stamping 140 corresponding to stamping 40, and embracing between itself and the backing plate spacers 142. These are additionally held also by the 'zoV ing plateabout its central opening. Anchor 146 may have an eccentric bushing 160 to facilitate adjustment.

The anchor bolt 146 in the arrangement shown passes throu h the following parts in order: '(1) the bac liig plate 12, (2) spacers 142, the reinforcing stamping 140, (4) the shouldered eccentric bushin 160 on whichthe shoe is pivoted and whose ead engages stampin 140, and (5) a second bushing 162 rivete tothe outboard art 154 and engaging the outer end of the rst bushing 160. Allthese parts are clamped ti htly together by a nut 152 on the anchor olt 146, thereby distributing the braking torque over almost the entire backing plate.

-While two illustrative embodiments have been described` in detail, it is not our intention to limit the scope of the invention to thoseparticular embodiments, or otherwise than by the terms of the appended claims.

We claim: U f

l. A brake assembly comprising a backing plate having a central axle o ning, an annular. stamping secured'to t e plate about said o ning and having a part projectin radia y outward paralleling said plate an spaced therefrom, and friction means having an anchor su ported at one end by the plate and at the ot er end by said part.

2. A brake assembly comprising a backing plate having a central axle opening, an annular stamping secured to the plate' about said opening, a second stamping secured to the annular stamping and projecting radiall outward paral eling said plate and spaced therefrom, and friction means having an anchor sup orted at one endl by the plate and at the ot er end by said second stamping.

3. A brake backing plate having a central reinforcing stamping with a part opposite the outer portion lo the plate andA with an anchor su ported at opposite ends respectively by e plate and said part. A n

4. A brake backing plate having at its Acenter an annular reinforcing stamping provided with a second and outwardl -projecting stamping with its end arrange opposite the outer portion of the plate and with an anchor supported at opposite ends respec' tively by the plate and said projecting stampg. A brake backing plate with a central axle opening andyhaving secured about said opening an annular reinforcing stamping having a lateral extension embracing spacers between itself and the plate, and provided with a camshaft bearing extendin through the plate 'and the spacers and t e lateral extension.

6. A brake backing plate `with a central axle fopening and having secured about said opening an annular reinforcing stamping having a lateral extension embracing spacers between itself and the plate, and provided 1i. Abrake havin backing with a camshaft rotatably mounted and extending through the plate and the spacers and the lateral extension.

7. A brake backing plate with a central axle opening and having secured about said opening an annular reinforcing stamping having a lateral extension spaced therefrom, brake-operating means supported at one point by the plate and at another point spaced from the first point by said extension, and a brake anchorage adjacent said means and lowing parts: a backing plate, a reinforcing stamping, a bushing having one end engaging the stamping and adapted to have a brake shoe pivoted thereon, a second bushing mounted in a supporting member and engaging the opposite end of the iirstbushing, and a bolt passing through the two bushings and through alined openings in the stamping and backing plate.

10. A brake havin a. backin plate, three posts carried by saif plate am? carrying an outboard part s aced from said plate and one of which posts is adapted to serve as abrake anchor, and a shoe pivoted on said anchor post and having. a relatively large clearance opening through which another of said posts passes.

plate, three posts carried by sai plate an of which posts is adapted to serve as-a brake anchor, and a shoe pivoted on said anchor post.

12. A brake anchorage comprising the following parts: a backing plate,,a reinforcing stamping, a bushing having one end engaging the stamping and adapted to have a brake shoe pivoted thereon, a second bushing mounted in a supportingmember and 'engagin 'the opposite end ofthe first bushing, and a olt passing through the two bushings and through alined openings in the stam ing and backing plate, one of said bushings ing ec'- centric and providing for an adjustment of the anchorage.

13.' An adjustable anchorage comprising a backing plate and an anchor pin carried thereb a member serving to supportthe' end of sai pin opposite the plate, and aneccencarrying an outboard part spaced from said plate and one tric bushing on the pin between the plate and said member.

14. An adjustable anchorage comprising a backing plate and an anchor pm carried thereby, and an eccentric bushing ysleeved on the 1n. p 15. A backing plate having reinforcing means, an eccentric bushing engaging the reinforced part of the plate, and a bolt passing through the bushing and plate and rigidlyV holding the bushing to adapt it to serve as a brake anchor.

16. A backing plate having aneccentric bushing adjacent thereto, anda bolt passing through the bushing and plate and rigidly holding the bushing to adapt it to serve as a brake anchor.

yIn testimony whereof, we have hereunto signed our names.

JOHN R. CAUTLEY. FREDERICK C. FRANK. 

